锂离子电池新型正极材料LiFePO4的研究进展

Research Progress on LiFePO4—a New Type of Cathode Materials

摘要:

橄榄石结构的LiFePO4作为锂离子电池的一种新型正极材料，具有原料来源广泛、价格低廉、对环境友好、能量密度和理论容量高、放电电压稳定、热稳定性和循环性好等优点，是下一代锂离子电池正极材料有力的竞争者。本文介绍LiFePO4正极材料的结构与性能以及存在的问题；综述制备LiFePO4的各种方法，即固相合成和液相合成两类，比较各种方法的优缺点；探讨近年来国内外对于改善LiFePO4电化学性能所进行的研究工作，并对其发展前景进行了展望

Abstract:

As a new type of cathode materials for lithium-ion battery, the olivine LiFePO4 has many advantages, such as abundant resources, low cost, environmental friend, higher energy density and theoretical capacity, steady discharge voltage, good thermal stability and excellent cycling performance, to be a strong competitor for the next generation cathode materials for lithium-ion battery. In this paper, the structure, properties and existing problems are briefly introduced and various synthetic methods for preparation state-of-the-art are summarized for LiFePO4, such as solid-state reaction methods and liquid-state synthetic methods. The advantages and drawbacks of each methods are compared and analyzed at the same time. The research progresses on improving electrochemical property of LiFePO4 at home and abroad in recent years are discussed, and the developing trend of LiFePO4 is also prospected